What are the precision tolerances for Certina mechanical watches?
The accuracy of the watch depends on the movement and on the individual habits of the wearer and can therefore vary. A qualified Certina watchmaker can adjust the precision of a watch to within the Certina tolerances. The majority of watches that do not have a chronometer certificate have average precision tolerances of between -5 / +30 seconds per day. To earn the title of chro-nometer, the mechanical movement’s average daily variation in rate must be between -2 / +12 seconds per day.
